Distribution of RRRs greater than 1+1SE and smaller than 1-1SE for different subgroups of population.

(1) Young age at onset is defined as younger than 50 years old for women and 55 for men. (2) Low risk for arterial thrombosis is defined as a risk comparable with the general population. High risk for arterial thrombosis is given to populations affected by one or more diseases with a high impact on cardiovascular risk (such as atrial fibrillation, end stage renal disease, previous cardiovascular event). Distribution of RRRs greater than 1+1SE and smaller than 1-1SE for different subgroups of population.